<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="10">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserlist">
                        <el-button slot="append" icon="el-icon-search" @click="getUserlist"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
                </el-col>
            </el-row>

            <!-- 用户列表区域 -->
            <el-table :data="userlist" border stripe>
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态" prop="mg_state">
                    <template slot-scope="scope">
                        <!-- {{scope.row}} -->
                        <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
                        </el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="175px">
                    <template slot-scope="scope">
                        <!-- 修改按钮 -->
                        <el-tooltip effect="dark" content="修改" placement="top" :enterable="false">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                        </el-tooltip>
                        
                        <!-- 删除按钮 -->
                        <el-tooltip effect="dark" content="删除" placement="top" :enterable="false">
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                        </el-tooltip>
                        
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button @click="setRoles(scope.row)" type="warning" icon="el-icon-setting" size="mini"></el-button>
                        </el-tooltip>
                        
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[1, 2, 5, 10]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
            </el-pagination>
        </el-card>

        <!-- 添加用户对话框 -->
        <el-dialog title="添加用户" :visible.sync="addDialogVisible"
        width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" 
            ref="addFormRef" label-width="70px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机号" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible= false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户对话框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible"
        width="50%" @click="editDialogClose">
            <el-form :model="editForm" status-icon :rules="editFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机号" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配角色对话框 -->
        <el-dialog
        title="分配角色" :visible.sync="setRolesDialogVisible" 
        width="50%" @close="setRolesDialogClosed">
            <div>
                <p>当前的用户：{{userInfo.username}}</p>
                <p>当前的角色：{{userInfo.role_name}}</p>
                <p>分配新角色：
                    <el-select v-model="selectedRolesId" placeholder="请选择">
                        <el-option v-for="item in rolesList" :key="item.id"
                        :label="item.roleName" :value="item.id">
                        </el-option>
                    </el-select>
                </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRolesDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRolesInfo">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>
<script>
export default {
    data(){
        //验证邮箱的规则
        var checkEmail = (rule, value, cb) => {
            //验证邮箱的正则表达式
            const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
            if(regEmail.test(value)){
                //合法邮箱
                return cb()
            }
            cb(new Error('请输入合法的邮箱'))
        }

        //验证手机号的规则
        var checkMobile = (rule, value, cb) => {
            //验证手机号的正则表达式
            const regMoblie = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
            if(regMoblie.test(value)){
                return cb()
            }
            cb(new Error('请输入合法的手机号'))
        }

        return {
            //获取用户列表的参数对象
            queryInfo: {
                query: '',
                //当前的页数
                pagenum: 1,
                //当前每页显示多少条数据
                pagesize: 2
            },
            userlist: [],
            total: 0,
            //控制添加用户对话框的显示与隐藏
            addDialogVisible: false,
            //添加用户的表单数据
            addForm: {
                username: '',
                password: '',
                email: '',
                mobile: ''
            },
            //添加表单的验证规则对象
            addFormRules: {
                username: [
                    {required: true, message: '请输入用户名', trigger: 'blur'},
                    {
                        min: 3, 
                        max: 10,
                        message: '用户名的长度在3~10个字符之间', 
                        trigger: 'blur'
                    }
                ],
                password: [
                    {required: true, message: '请输入密码', trigger: 'blur'},
                    {
                        min: 6, 
                        max: 15,
                        message: '密码的长度在3~10个字符之间', 
                        trigger: 'blur'
                    }
                ],
                email: [
                    {required: true, message: '请输入邮箱', trigger: 'blur'},
                    {validator: checkEmail, trigger:'blur'}
                ],
                mobile: [
                    {required: true, message: '请输入手机号', trigger: 'blur'},
                    {validator: checkMobile, trigger:'blur'}
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            //查询到的用户信息对象
            editForm: {},
            //修改表单的验证规则对象
            editFormRules: {
                email: [
                    {required: true, message: '请输入邮箱', trigger: 'blur'},
                    {validator: checkEmail, trigger:'blur'}
                ],
                mobile: [
                    {required: true, message: '请输入手机号', trigger: 'blur'},
                    {validator: checkMobile, trigger:'blur'}
                ]
            },
            // 控制分配角色对话框的显示与隐藏
            setRolesDialogVisible: false,
            // 需要被分配角色的用户信息
            userInfo: {},
            // 所有角色的数据列表
            rolesList: [],
            // 已选中角色id值
            selectedRolesId: ''

        }
    },
    created(){
        this.getUserlist()
    },
    methods: {
        async getUserlist(){
            const {data: res} = await this.$http.get('users', {
                params: this.queryInfo
            })
            if(res.meta.status !== 200){
                return this.$message.error('获取用户列表失败！')
            } 
            this.userlist = res.data.users
            this.total = res.data.total
        },
        //监听 pagesize 改变事件
        handleSizeChange(newSize){
            // console.log(newSize)
            this.queryInfo.pagesize = newSize
            this.getUserlist()
        },
        //监听页码值改变的事件
        handleCurrentChange(newPage){
            // console.log(newPage)
            this.queryInfo.pagenum = newPage
            this.getUserlist()
        },
        //监听 switch 开关状态的改变
        async userStateChanged(userinfo){
            // console.log(userinfo)
            const {data: res} =  await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
            if(res.meta.status !== 200) {
                userinfo.mg_state = !userinfo.mg_state
                return this.$message.error('更新用户数据失败！')
            }
            this.$message.success('更新用户状态成功！')
        },

        //监听添加用户对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //点击按钮添加新用户
        addUser(){
            this.$refs.addFormRef.validate( async valid => {
                // console.log(valid)
                if(!valid) return
                //可以发起添加用户的网络请求
                const {data: res} = await this.$http.post('users', this.addForm)
                if(res.meta.status !== 201) {
                    this.$message.error('添加用户失败！')
                }
                this.$message.success('添加对象成功！')
                //隐藏添加用户的对话框
                this.addDialogVisible = false
                //重新获取用户列表数据
                this.getUserlist()
            })
        },
        //展示编辑用户的对话框
        async showEditDialog(id){
            // console.log(id)
            const {data: res} = await this.$http.get('users/' + id)
            if(res.meta.status !== 200){
                return this.$message.error('查询用户信息失败！')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        //监听修改用户对话框的关闭事件
        editDialogClose(){
            this.$refs.editFormRef.resetFields()
        },
        //修改用户信息并提交
        editUserInfo(){
            this.$refs.editFormRef.validate( async valid => {
                // console.log(valid)
                if(!valid) return
                //发起修改用户信息的请求
                const {data:res} = await this.$http.put('users/' + this.editForm.id, 
                {
                    email: this.editForm.email,
                    mobile: this.editForm.mobile
                })

                if(res.meta.status !== 200){
                    return this.$message.error('更新用户信息失败！')
                }

                //关闭对话框
                this.editDialogVisible = false
                //刷新数据列表
                this.getUserlist()
                //提示修改成功
                this.$message.success('更新用户信息成功！')
            })
        },
        //根据id删除对应的用户信息
        async removeUserById(id){
            // console.log(id)
            //弹框询问用户删除信息
            const confirmResult = await this.$confirm('此操作将永久删除此用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)

            //如果用户确认删除，则返回值为字符串 confirm
            //如果用户取消了删除，则返回值为字符串 cancel
            // console.log(confirmResult)
            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除')
            }
            const {data: res} = await this.$http.delete('users/' + id)
            if(res.meta.status !== 200 ){
                return this.$message.error('删除用户失败！')
            }

            this.$message.success('删除用户成功！')
            this.getUserlist()
        },
        // 展示分配角色的对话框
        async setRoles(userInfo){
            this.userInfo = userInfo

            // 在展示对话框前，获取所有角色的列表
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200 ){
                return this.$message.error('获取角色列表失败！')
            }
            this.rolesList = res.data

            this.setRolesDialogVisible = true
        },
        // 点击按钮，分配角色
        async saveRolesInfo(){
            if(!this.selectedRolesId) {
                return this.$message.error('请选择要分配的角色！')
            }
            const {data:res} = await this.$http.put(`users/${this.userInfo.id}/role`, 
            {
                rid: this.selectedRolesId
            })

            if(res.meta.status !== 200 ){
                return this.$message.error('更新角色失败！')
            }

            this.$message.success('更新角色成功！')
            this.getUserlist()
            this.setRolesDialogVisible = false

        },
        // 监听分配角色对话框的关闭事件
        setRolesDialogClosed(){
            this.selectedRolesId = ''
            this.userInfo = {}
        }

    },
}
</script>
<style lang="less" scoped>

</style>